Please help me ASAP doctor scheduled dnc for tomorrow but I’m not convinced baby’s dead

Ok so a little about my past I was pregnant in May and every apt I had my levels were going up just fine but they said 3 times all they saw was a sac no yolk sac in it I kept saying it was probably just to early but the doc just seemed like I needed to go ahead and get the dnc like I was annoying him so I did and had a dnc June 15th. Fast forward I got pregnant again now I went to the er Sunday had scan done they saw the gestational sac and beginnings of a yolk sac and my hcg had gone up but Monday at 4am I began bleeding so my doc got me in at 4:30 with him he never checked hcg just did ultrasound and clearly saw gestational sac and a clear yolk sac and even what looked like the begging of a heart beat is I was sent home and told to come back for follow up Monday we’ll I kept bleeding reallly heavily so they got me back in today the ob came in to do the ultrasound no lie puts the vaginal ultrasound in there says yep sacs smaller pulls it out and says we’re doing a dnc. He only had it in me for not even 30 seconds and yea I saw what looked like the sac had gotten smaller but when he moved over I saw a clear sac that was pretty big with something in it. I asked about it and he just said I didn’t see it it’s nothing let’s go ahead and do the dnc in the morning. I’m so scared right now I don’t feel right about this at all. I took a pregnancy test today and it was even darker than one I took yesterday somethings not right y’all but what can I do! Can I go to the er and be like look my ob says I’m gonna need a dnc but I don’t feel right about it and want a second opinion before my surgery in the morning or do I just trust that he knows what he’s talking about. Even if he did the dnc and saw he was wrong and the baby was fine #1 it’s to late the baby’s gone then and #2 he won’t admit it he’ll say it wouldn’t have made it to save his own ass please y’all help me

Update: so as I said in a comment below the reason I’m struggling with this is I’ve always been a really soft spoken girl who doesn’t stand up for herself and when I went to my family for advice they all told me I just needed to get it done and over with that my doctor has been doing this for years and know what he’s talking about and he wouldn’t have said I need a dnc if I didn’t need one. So I went to my hubby about it and he agreed to take me to the er before my surgery to be 100% certain about it. So since my surgery is at 8:30 and ers take forevvvver to get through were going to get up and go in at 4am I’m gonna go in there and just tell them “look I’m scheduled to have a dnc this morning but the ob that told me I had to have one done did nothing to help me understand why or show me what was wrong and he didn’t even do a hcg check so can you please just check my hcg and do another ultrasound on me and have the tech show me everything while they explain it to me” this way I know without a shadow of a doubt I did all I could do for my baby and if it’s true I’ll get the surgery but then that night I’m drinking some wine having a rare stake and a good cry then I’ll start preparing to try again